As a first responder, you are welcome to make medical decisions based on the injury but you also must promote the learning of first aid. First aid is given to prevent any further aggravation of an injury for the injured. Here are the 4Ps of first aid.
I was handling the session today in a college. Suddenly, during the CPR Demo, a girl in the batch demonstrating CPR had discomfort and started wheezing. All of a sudden, she had some partial body movement and fell. Holding her, I gently placed her on the floor.